This is the 723rd most frequent Russian word.
оказывает
"Оказывает" means "provides" or "renders."
In this sentence, 'оказывает' is used to mean 'provides' or 'offers', specifically in the context of offering help or support.
Он оказывает поддержку своим друзьям.
He provides support to his friends.
Here, 'оказывает' is used to express the idea of exerting or having an impact, in this case, a positive one on health.
Эта медицина оказывает положительное влияние на здоровье.
This medicine has a positive effect on health.
In this context, 'оказывает' conveys the act of paying or giving attention to someone or something.